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Who Made This Doublet?

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#1 Tom Duncan

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Posted 23 May 2019 - 11:29 AM

Anyone have any idea who made this scope? No name or designations on it anywhere, missing the focuser, all plastic except for the rack and pinion focuser shaft and the three brass screws holding the tripod plate. Looks to be a 65mm doublet, can't tell if its cemented or not. Note the reflections in the image of the glass are of an overhead lamp, not an imperfection, the glass and coatings are fine. 

 

Frankly it looks like a cheap scope from Toys R Us but I'd be curious to know more as I've never seen it before. 

 

Thanks

 

Tom Duncan 

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Edited by Tom Duncan, 23 May 2019 - 01:08 PM.

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#2 Bomber Bob

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Posted 23 May 2019 - 11:39 AM

Didn't Vixen sell some fracs like that during the Halley Insanity??



#3 Nippon

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Posted 23 May 2019 - 11:57 AM

I've been using Vixen scopes and mounts since the early 80s and that looks very un Vixen to me. I believe they did make a sort of Haley scope but it looked like a Vixen. 



#4 hfjacinto

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Posted 23 May 2019 - 12:52 PM

You sure that’s a scope? That looks like some of the plumbing in my basement... :)
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#5 rolo

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Posted 23 May 2019 - 01:58 PM

Home made science project?


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#6 starman876

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Posted 23 May 2019 - 01:58 PM

I think JW is right.  I saw something that looked just like that and it was a Vixen.



#7 Bomber Bob

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Posted 23 May 2019 - 02:22 PM

There were a ton of "economy" scopes, one-offs, & oddballs during those crazy days...



#8 csrlice12

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Posted 23 May 2019 - 05:00 PM

and these days ain't crazy????


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#9 Tyson M

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Posted 23 May 2019 - 05:02 PM

Better call the authorities to have a look at it with the proper gear and bomb disposal robot just in case.


Edited by Tyson M, 23 May 2019 - 05:02 PM.


#10 rolo

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Posted 23 May 2019 - 05:53 PM

I think JW is right.  I saw something that looked just like that and it was a Vixen.

Its a Plastihashi


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#11 Nippon

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Posted 23 May 2019 - 06:20 PM

It looks like the product of 3D printing. Except for the lens.



#12 peleuba

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Posted 23 May 2019 - 07:56 PM

Its a Plastihashi

 

Plastro-Physics


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#13 Eddgie

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Posted 23 May 2019 - 08:15 PM

Does the tube appear to be phenolic tube?  Does the end at the focuser unscrew or detach?

 

If so, it could be a BW Optik scope  ITE Sold some BW Optik telescope kits in the 90s, and if it has Phenolic tube, this may be one of those.

 

(Just an FYI.   The BW 4" f/6 kit used ED glass. If this does turn out to be a BW Optik kit, maybe it has ED glass too.)


Edited by Eddgie, 23 May 2019 - 08:21 PM.


#14 johnsoda

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Posted 23 May 2019 - 08:24 PM

The bigger question is how many readers recognize that yellow object in front of the scope. I think you lost everyone under 50 with that. 


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#15 gnowellsct

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Posted 23 May 2019 - 10:49 PM

That's my scope.  I made it and I was embarrassed by it and was going to throw it out but I gave it to Toys R Us instead.  You really don't want to buy a refractor that I made.  :(



#16 Jon Isaacs

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Posted 24 May 2019 - 07:47 AM

(Just an FYI.   The BW 4" f/6 kit used ED glass. If this does turn out to be a BW Optik kit, maybe it has ED glass too.)

 

I believe the "ED" glass used was FK-5 which is the same used in the TV Pronto and offers little improvement over an achromat. 

 

Jon



#17 Jon_Doh

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Posted 24 May 2019 - 08:15 AM

You sure that’s a scope? That looks like some of the plumbing in my basement... smile.gif

You've just given me an idea for my next project grin.gif 



#18 Tom Duncan

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Posted 24 May 2019 - 10:17 AM

Eddgie, the tube looks like common white PVC or some such, though not made of plumbing parts, just similar plastic. The end of the drawtube has a groove around it like thumbscrews would act on. I've done extensive research online for 'bw-optik' and 'bw-optik kit' and find reference to it but no images, even with a Google Image search. Anyone have a pix?

 

Tom 



#19 Tom Masterson

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Posted 25 May 2019 - 02:28 PM

I have a BW Optik and thats not one of them. The kit included the lens in an anodised aluminum cell with the words "BW Optik, Semi-Apo 100/600" engraved on the side. I'm not home to attach a photo. They were advertised as having some sort of ED element. Color correction on my example is odd with a magenta halo around bright stars and soft images at powers over 100. Plop a green filter into the eyepiece and the views were sharp. Lenses supposedly came from former Soviet military binoculars and were reported to be corrected for using with large long glass-path prisms.

 

Around the same time there was a guy selling scopes in PVC tube using Vixen lenses called TeleHoon and I think he was in Canada. I had one, and it looked a little different but his design changed a few times over the years. I don't remember them having rack and pinion focusers but that was a ling time ago. 1990s? The lens on mine was retained in the tube by split pieces of the PVC tubing glued in place. I think later ones had more of a machined plastic cell.


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#20 Starhawk

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Posted 26 May 2019 - 12:20 AM

The early selling-on-ebay-as-a-business days had people importing all kinds of bizarre stuff and selling it.  This could be one.

 

-Rich



#21 Jarno

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Posted 28 May 2019 - 06:06 AM

Its a Plastihashi

Held together with TeleGlue?

 

The lens cell looks professionally made but the remainder is definitely someone's DIY project.

 

Jarno




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